<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>无刷新评论</title>
    <script src="js/jquery-1.11.3.js"></script>
    <script>
        $(function() {
            $("#btn_Add").click(function() {
                var str = $("#txt").val(); //获取文本框的文本
                $("ul").append("<li>" + str + "</li>"); //为ul列表添加新的节点
            });
        })
    </script>
</head>

<body>
    <ul>
        <li>荧祸守心问奈何</li>
        <li>怀璧明罪问奈何</li>
    </ul>
    <input type="text" id="txt" />
    <button id="btn_Add">添加</button>
</body>

</html>
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